From what I can see, there are several networks available in HD on Bell but not SC (example: CityTV, CTV, Global and CBC W). If the PQ of those is going to be poor for me with SC, I might just cancel Bell and live without SC.
There are also a couple hundred SD channels on both compared to only 30 or so HD channels, so a substantial amount of what I watch is in SD.
Generally speaking SD is better on SC than Expressvu as there are fewer channels/transponder on SC. Especially true with TSN/Sportsnet feeds.
CTV HD is on SC
The HD PQ is far better on the sports channels on SC vs Bell as 3 HD channels/transponders gives 35% average higher bit rate on SC (8PSK) vs Bell (QPSK).
Just don't spend $$$ on the 530 DVR (at least right now)